Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Plans - Employee Stock Purchase Plan - Additional Information (Detail)

v3.20.1
Stock-Based Compensation Plans - Employee Stock Purchase Plan - Additional Information (Detail)
3 Months Ended
Mar. 31, 2020
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Common stock shares available for issuance 5,065,218
Unrecognized stock-based compensation expense | $ $ 28,285,000
Unrecognized stock-based compensation expenses recognition period 3 years 9 months 29 days
Employee Stock Purchase Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Length of purchase intervals 6 months
ESPP discount rate 10.00%
Common stock reserved and available for issuance 366,667
Common stock shares available for issuance 204,473
Unrecognized stock-based compensation expense | $ $ 23,000
Unrecognized stock-based compensation expenses recognition period 1 month 13 days
Employee Stock Purchase Plan - Annual Available for Issuance Share Increase [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Common stock available for future issuance authorized annual share increase 366,667
Common stock available for future issuance authorized annual percentage increase 1.00%